Method for operator guidance, control panel component, production of a control panel component and home appliance comprising a control panel component

ABSTRACT

A rotary knob for a control panel of a home appliance comprises a support collar, a fixed frontal plate forming a cover cap that is arranged at a front end of the support collar, a fixed sensor layer that is operable to detect touch inputs at the frontal plate, discrete indicator elements forming an indicator layer, which are operable to provide operator guidance, a rotatable ring that is rotatably mounted to the support collar, the rotatable ring being rotatable with respect to the fixed frontal plate, and circuitry arranged to detect rotary inputs via the rotatable ring, and touch inputs via the frontal plate.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application is a Continuation-In-Part of U.S. patent application Ser. No. 14/193,094, filed Feb. 28, 2014, now U.S. Pat. No. 9,983,783, which claims priority from German patent application 10 2013 113 772.5, filed Dec. 10, 2013. The entire content of those applications is fully incorporated by reference herewith.

BACKGROUND

The disclosure relates to a method for selective operator guidance for operator inputs, in particular for operator inputs in a home appliance. In addition, the disclosure relates to a control panel component, in particular for an operating control panel of a home appliance, and to a method for producing a control panel component, in particular for an operating control panel of a home appliance.

The approaches and configurations described and explained below may be used in particular in the field of home appliances. Home appliances may include in particular so-called “white goods”, i.e., for example, conventional appliances for cooling, washing, cooking, baking etc.

Control panel arrangements or operating front plates in home appliances may generally comprise interfaces for user interaction. These may involve, for example, displays, warning lights, rotary switches, pushbuttons, momentary-contact pushbuttons, touch-sensitive surfaces or displays and associated labels or symbols. Conventional input elements such as, for example, buttons or switches often result in a certain degree of complexity in terms of the manufacture of operating front plates and control panel arrangements. This complexity may be even greater the more possibilities there are for user interaction, i.e. the more user inputs are possible. In addition, a significant increase in the number of switches, buttons or the like can make operating the home appliance more difficult.

Various approaches are known from the prior art for enabling a plurality of operator inputs using only one “user interface”. In this connection, DE 10 2008 032 451 A1 discloses a cooking appliance and a method for operating a cooking appliance, wherein the cooking appliance comprises an input display which is arranged as a touchscreen and may graphically display various information. In particular, this includes representing information in the form of graphical visualizations and/or animations. However, such a configuration is associated with a high level of complexity and is therefore essentially only suited for high-end appliances and for appliances for professional use.

In view of this it is an object to present a method for selective operator guidance in a home appliance.

It is a further object to present a control panel component, in particular an operating control panel for a home appliance, which is suitable for implementing the above operator guidance method.

It is a further object to present a corresponding method for producing such a control panel component, which may be implemented with little complexity and nevertheless may allow an extended user interaction.

It is a further object to present a control panel component that is suitable for a large number of variants and configurations in order to be able to limit the manufacturing complexity involved even in the case of relatively small production batch sizes.

It is a further object to allow for operator guidance which facilitates operation and use of the home appliance.

It is a further object to present a front plate arrangement and a home appliance comprising such a front plate arrangement that provides a high-quality integrated configuration.

It is yet a further object to present a front plate arrangement and a home appliance comprising such a front plate arrangement that may be perceived by the operator as providing high visual quality.

SUMMARY

In respect of the operating method, these and other objects of the present disclosure are achieved by a method for selective operator guidance for operator inputs, in particular for operator inputs in a home appliance, comprising the following steps:

-   -   providing a control panel component comprising a sensor layer         hidden by a cover layer, in particular a sensor layer extending         in a flat manner, which is designed to detect operator inputs,         in particular operator gestures,     -   defining a present input mode, comprising:         -   allocating at least one defined field to be evaluated for             operator inputs, in particular operator gestures, on the             sensor layer depending on the desired input mode, and     -   detecting and evaluating operator inputs in the field to be         evaluated.

In respect of the control panel component, these and other objects of the present disclosure are achieved by a control panel component, in particular for an operating control panel for a home appliance, comprising the following: a cover layer, a sensor layer, which covers a rear side of the cover layer in a flat manner, at least sectionally, an indicator layer comprising at least one discrete indicator element, wherein the sensor layer is arranged in between the cover layer and the at least one discrete indicator element, wherein the sensor layer is designed to detect operator inputs, in particular operator gestures, wherein the sensor layer may be activated sectionally depending on a desired input mode, and wherein the at least one discrete indicator element is actuable for selective operator guidance.

In respect of the production method, these and other objects of the present disclosure are achieved by a method for producing a control panel component, in particular an operating control panel for a home appliance, comprising the following steps:

-   -   providing a cover layer, in particular a cover layer consisting         of a plastic material,     -   providing a sectionally activatable sensor layer, in particular         a sensor layer extending in a flat manner, which is selected to         detect operator inputs, in particular operator gestures,     -   joining the cover layer and the sensor layer, and     -   allocating at least one field to be evaluated for operator         inputs on the sensor layer depending on a desired configuration         of the control panel component.

According to the present disclosure, the sensor layer may be arranged “invisibly” to a user behind the cover layer, wherein the sensor layer defines a region, in particular an area, in which operator inputs may potentially be detected. During production or during operation, a section of the sensor layer may now be selected and activated in a targeted manner in order to be able to detect and evaluate user inputs there. In other words, the control panel component may comprise a basic configuration and be actuated in variant-specific fashion depending on the desired configuration. It is thus conceivable, for example, to use only one or more (areas) sections of the sensor layer in the selected variant actually for the detection and evaluation of the operator inputs. In this way, a large number of variants in terms of the control panel component may be implemented with little complexity.

In addition, the actuation or allocation of the sensor layer or the selected sections of the sensor layer during operation may take place depending on the presently desired input mode. In other words, this means that one and the same sensor layer or sections thereof may be selected for different inputs. In other words, for example, in the case of a washing machine, a specific selected section of the sensor layer may be used both for selecting a wash program (first input mode) and for selecting a wash temperature (second input mode). This example is cited merely by way of representation of a large number of conceivable combinations and configurations, for illustrative purposes.

The sensor layer is arranged on that side of the cover layer of the control panel component which is remote from the operator in the installed state. Accordingly, this does not result in any optical impairments when only one subsection of the sensor layer is actually used for detection and evaluation of operator inputs.

In accordance with various aspects of the present disclosure, the control panel component may be provided with an indicator layer (or: indicator plane), which is arranged behind the sensor layer (when viewed from the cover layer). In other words, the indicator layer and the sensor layer are arranged one on top of the other, at least sectionally. The indicator layer may be formed from at least one discrete indicator element. Within the meaning of the present disclosure, the discrete indicator element may be, in particular, an optical indicator element which is designed to represent a limited quantity of information. A discrete indicator element is in particular not a graphical indicator which is designed to represent images generated from pixels. A discrete indicator element within the meaning of the present disclosure may be, for example, status symbols, warning indicators, warning LEDs, bar indicators, segment indicators and similar “discrete” indicator elements. Discrete indicator elements are generally much more favorable than pixel-based graphical indicator elements. In addition, discrete indicator elements generally comprise an increased level of robustness and suitability for fluctuating environmental conditions. In other words, a large quantity of information may also be represented without a pixel-based display. The operator may be given the impression that he is interacting directly with the indicator since he may perform inputs directly in the region of the activated or activatable discrete indicator elements.

In accordance with various aspects of the present disclosure, at least one discrete indicator element or a plurality of discrete indicator elements which define the indicator layer, may be arranged “behind” the sensor layer. The at least one discrete indicator element may be used in connection with the facility for the allocation and activation of sections of the sensor layer for selective operator guidance or operator instruction. By way of example, at least one discrete indicator element may be activated selectively in order to output an optical signal, which indicates to the operator that he may perform inputs in the region of the activated indicator element, which inputs are detected by the (hidden) sensor layer.

In an exemplary embodiment, the control panel component, in particular its sensor layer, is designed to detect analog or quasi-analog inputs by the user. In other words, in an exemplary embodiment the sensor layer is used not only to switch specific functions on or off (digitally). Instead, it is now possible to detect extended user inputs, in particular user gestures, which enable the selection of a value within a value range, for example. In this way, the operation of the home appliance may be significantly simplified. For example, the operator may select a target temperature within a comparatively wide temperature range simply by “swiping” along the cover layer. However, the operator may also, in a different operating mode, perform a program selection, for example, in the same region when this is indicated to him by a corresponding activated discrete indicator element.

Operator inputs may generally include an increase in proximity to the cover layer and/or touching of the cover layer. Operator inputs may also be performed in punctiform fashion (for example in the form of a click or a double click). However, operator inputs may also include movement paths, such as swiping movements, circular movements or the like. Operator inputs may in principle be performed using an aid, for example a stylus, or by means of body parts, in particular fingers or thumbs. Operator inputs may also be combined in order to enable complex functions. These may be, for example, a zoom function, i.e., for example, an enlargement or reduction function. The sensitivity of the sensor layer to specific user inputs may be influenced, for example, by means of such complex gestures. Other extended/complex inputs are conceivable. For example, the sensitivity to swipe gestures, for example for temperature selection or time selection, may be influenced by means of a zoom gesture.

Within the meaning of the present disclosure, the term operator guidance may include an instruction or direction for performing an input to the operator, but in addition also feedback to the operator once an input has been made. An instruction may be provided, for example, when an activated discrete indicator element indicates or highlights a specific region of the (hidden) sensor layer which is at present activated for detection of operator gestures. Feedback to the operator may include, for example, a specific optical output used as a response to a specific operator input. This may include, for example, a change to a bar indicator which is in the form of a discrete indicator element. In addition, the optical output may include, for example, a change in color of a discrete indicator element. In this way, indicator elements with a relatively simple configuration per se may be used to represent complex information. A sufficiently detailed user interaction may take place; this may increase the value, as perceived by the operator.

In an exemplary embodiment, the cover layer of the control panel component completely covers the sensor layer. The cover layer is in particular a substantially closed cover layer which completely covers the sensor layer. In an exemplary embodiment, the sensor layer is arranged on the rear side of the cover layer, i.e. on that side of the cover layer which is remote from the operator during normal operation.

The manufacturing method for producing the control panel component enables a high degree of flexibility during production. Since, by means of the sectionally activatable sensor layer, a large potentially activatable sensor area may be provided, sections for user inputs of this sensor area may be selected in a targeted manner by suitable contact being made or suitable actuation (in each case in accordance with the presently desired configuration). The introduction of the sectionally activatable sensor layer is not associated with significant additional complexity. Instead, cost advantages in terms of production may result since a large number of variants may be realized on the basis of one basic configuration. The variants may differ from one another in terms of the variety of functions, for example. Irrespective of whether the home appliance to be produced has a small function range, an average function range or even a large function range, the required operator inputs may be detected and evaluated in a simple manner by the configuration and actuation of the activatable sensor layer.

By way of example, the control panel component may be provided with the sensor layer in the mentioned manner and may be printed on its side facing the operator or treated in another way in order to produce operating symbols which may be perceived by the operator. On the basis of the presently selected layout for the printing or processing, a layout corresponding to this of the sensor layer for selective activation may now be selected using software or control engineering. In other words, for example, a control device may be configured and designed, for example, in such a way that operator inputs are detected only in those regions of the sensor layer which correspond to the operator symbols produced on the cover layer. The corresponding assignment of the selected sections of the sensor layer may be realized in a simple manner on a software basis or using circuitry. In other words, a freely scalable control panel may be produced. The control panel may be provided with its function allocation at the end of the production process.

In an exemplary embodiment, the method for producing the control panel component may include the following steps:

-   -   providing at least one discrete indicator element,     -   joining the cover layer, the sensor layer and the at least one         discrete indicator element, wherein the sensor layer is arranged         in between the cover layer and the at least one discrete         indicator element, and     -   providing an interface for a control device for actuating the at         least one discrete indicator element and for evaluating operator         inputs detected at the sensor layer for selective operator         guidance.

The interface may be, for example, a contact with the sensor layer, via which the control device communicates with the sensor layer. In addition, the interface may include contact between the control device and the at least one discrete indicator element, with the result that the control device may activate or deactivate selectively the at least one discrete indicator element.

In addition, the method may comprise the following step:

-   -   allocating at least one defined field to be evaluated for         operator inputs, in particular operator gestures, on the sensor         layer for defining a present input mode depending on the desired         input mode.

In an exemplary embodiment, alternatively or in addition, the method may include the following steps:

-   -   processing the cover layer, in particular printing or coating,         for producing at least one optically and/or haptically         perceivable operating symbol for operator guidance, and     -   allocating at least one field to be evaluated for operator         inputs on the sensor layer depending on a size and/or         arrangement of the at least one optically and/or haptically         perceivable operating symbol for selective operator guidance.

In other words, the operator guidance may be performed by means of selectively activatable elements, the at least one discrete indicator element, and by permanently provided elements, the at least one optically and/or haptically perceivable operating symbol. Both types of elements may be combined with one another.

In an exemplary embodiment of the control panel component, the sensor layer is designed as a capacitive sensor layer, wherein the sensor layer is in particular designed to detect touches on the cover layer and/or increasing proximity to the cover layer in the region of the sensor layer.

In other words, the sensor layer may be configured as a projected-capacitive sensor layer, for example. The sensor layer may in particular be configured as a film-based sensor layer. It goes without saying that other functional principles for the sensor layer for detecting touches and/or increasing proximity to the cover layer may be used. By way of example, the sensor layer may be configured as an inductive sensor layer, a resistive sensor layer, an optical sensor layer and/or a combined sensor layer.

The sensor layer may comprise in particular two planes which are insulated from one another and which are each provided with a conductive material. By way of example, a first plane may comprise a row structure and a second plane may comprise a column structure. Other configurations such as, for example, rhombuses or the like are conceivable. In an exemplary embodiment, the sensor layer is configured such that multidimensional operator gestures and/or a plurality of operator inputs may be detected simultaneously. Multidimensional operator gestures may include, for example, swiping movements. The capacity to simultaneously detect a plurality of operator inputs may be characterized as, for example, multi-touch capability.

In an exemplary embodiment, the control panel component comprises an interface for a control device, which is designed to actuate selectively the sensor layer and the at least one discrete indicator element in order to define a plurality of input modes. The at least one discrete indicator element may be activated selectively in order to indicate to an operator that a specific type of input may be performed at a specific location on the sensor layer. The control device may activate and correspondingly evaluate a section of the sensor layer for inputs in a targeted manner via the interface.

In an exemplary embodiment of the control panel component, the control device is designed to define a present input mode, wherein the control device is designed further to allocate at least one field to be evaluated for operator inputs on the sensor layer taking into consideration at least one selected input mode. This may be associated with the activation of at least one discrete indicator element in order to indicate to the operator where he may perform his inputs and what type of input is required at present.

In other words, in some exemplary embodiments a system for detecting operator inputs may be formed which comprises at least one control panel component and at least one control device in accordance with one of the abovementioned aspects. Such a system may be formed firstly as a discrete component. Secondly, it is conceivable for the control function for actuating the control panel component to be transferred to a (superordinate) control device of the home appliance. Accordingly, the system may be formed, during fitting, by joining the control panel component to complete the home appliance.

In accordance with a further configuration of the control panel component, the indicator layer comprises at least one indicator element which is in the form of a discrete, selectively activatable symbol or a discrete, selectively activatable segment indicator, in particular in the form of a seven-segment indicator. A selectively activatable symbol may be, for example, a light-emitting diode or a collection of light-emitting diodes. The selectively activatable symbol may further comprise a symbol representation, for example a silhouette which may be illuminated by means of an LED or a similar light source or a pictogram. A selectively activatable segment indicator may comprise, for example, a bar indicator, a circular segment indicator, a multi-segment indicator for representing alphanumeric information or the like. In some exemplary embodiments, various indicator types may be combined with one another in order to form the at least one indicator element. The at least one indicator element may be matched in particular to an expected user input. Thus, for example, a swipe function may be combined with a bar segment indicator and/or an alphanumeric segment indicator. By swiping along the presently activated section of the sensor layer, the operator may influence the directly indicated value, with the result that direct feedback to the operator is provided. The at least one indicator element may also visualize a limitation of the presently defined field.

In an exemplary embodiment, the cover layer and the sensor layer are configured so as to be transparent or translucent, at least sectionally. In other words, the cover layer and the sensor layer may be at least sectionally optically transmissive and therefore the optical perception of the at least one discrete indicator element which may be covered both by the sensor layer and by the cover layer may be improved. The cover layer and the sensor layer may be configured to be at least partially transparent or translucent, with the result that, for example when a discrete indicator element is not activated, this is not perceivable to the operator. In this way, the operation of the home appliance may be simplified further since discrete indicator elements which are not presently required may be made “invisible”.

In accordance with a further configuration of the control panel component, the cover layer is surface-treated, in particular printed or coated, at least sectionally, and wherein the cover layer comprises at least one optically and/or haptically perceivable operating symbol for operator guidance. By way of example, the cover layer may be printed. Alternatively or in addition, the cover layer may be provided with raised or depressed structural elements. In addition, it is conceivable for the surface structure of the cover layer to be influenced in a targeted manner in order to clearly highlight the at least one operating symbol. The mentioned measures may be combined with one another.

In this way, the control panel component may be provided with permanently visible elements, as an alternative or in addition to the selectively activatable discrete indicator elements, in order to identify input possibilities for the operator. The at least one optically and/or haptically perceivable operating symbol may comprise, for example, a graphical representation and/or an alphanumeric representation. In particular, the use of pictograms is conceivable. In the case of the sensor layer, a corresponding field or a section in which user inputs which are linked to the operator symbol may be detected may be assigned to the at least one operating symbol of the cover layer.

In an exemplary embodiment, a control panel component in accordance with one of the abovementioned aspects is used in a home appliance.

In an exemplary embodiment, the method for selective operator guidance may include the following step:

-   -   activating at least one discrete indicator element of an         indicator layer which is arranged on that side of the sensor         layer which is remote from the cover layer for identifying the         field to be evaluated of the sensor layer

In an exemplary embodiment, the defined field to be evaluated is at least adjacent to the activated discrete indicator element. In a further exemplary embodiment, the allocated field to be evaluated is in front of the activated discrete indicator element (for the operator). In this way, the operator may be given the impression of being able to perform desired inputs, for example a selection of or a change to a value, directly with the indicator element.

In accordance with a further exemplary embodiment of the method for operator guidance, the step of defining the present input mode further comprises the step of assigning the field to be evaluated for operator inputs to an operating symbol, which may be perceived optically and/or haptically on the cover layer. In this way, permanently perceivable symbols may also be used for instruction and guidance of the operator. In an exemplary embodiment, permanently visible elements and selectively activatable elements may be combined with one another in order to further increase operator convenience and to be able to reduce the risk of erroneous operations. In a further exemplary embodiment, the method for selective operator guidance further includes the step of outputting feedback to the operator, in particular visual feedback, by selective activation of at least one discrete indicator element of the indicator layer. The activation of the at least one discrete indicator element may also include, for example, a change to the at least one discrete indicator element. This may include, by way of example, a change in color. In addition, this may also include a change to a discrete bar indicator or segment indicator.

In an exemplary embodiment, the discrete indicator element activated for the purpose of feedback to the operator is, when viewed by the operator, in the presently allocated field or at least in the vicinity of the presently allocated field, with the result that the impression of direct feedback is provided. This may further increase the perceived value of the home appliance and operating procedure.

In accordance with a further aspect of the present disclosure, there is presented a rotary knob for a control panel of a home appliance, comprising a support collar, a fixed frontal plate forming a cover cap that is arranged at a front end of the support collar, a fixed sensor layer that is operable to detect touch inputs at the frontal plate, discrete indicator elements forming an indicator layer, which are operable to provide operator guidance, a rotatable ring that is rotatably mounted to the support collar, the rotatable ring being rotatable with respect to the fixed frontal plate, and circuitry arranged to detect rotary inputs via the rotatable ring, and touch inputs via the frontal plate.

This aspect may be combined with any further aspect and embodiment as described herein. This applies to structural features, but also to manufacturing and operating aspects.

In accordance with the above aspect, the rotatable ring does not have to include circuitry, sensor grids, etc. In an exemplary embodiment, the rotatable ring is an injection-molded plastic ring. The frontal plate is not arranged to be rotated with the rotatable ring. Hence, the frontal plate is a fixed frontal plate that is not moved with respect to the control panel and/or the support collar when the rotatable ring is rotated.

In certain embodiments, the support collar extends from a cover of the control panel. Hence, the support collar may be integrally formed with the cover of the control panel. In the alternative, the support collar is arranged as a separate part that is attached to the cover of the control panel. The frontal plate may be attached to the support collar to define a bearing seat for the rotatable ring.

It is not necessary to provide touchscreens and/or further sophisticated displays at the frontal plate of the rotary knob. Hence, the rotary knob is easy to manufacture, easy to assemble, and easy to operate.

Since the frontal plate of the rotary knob is not arranged to be rotated with the rotatable ring, it is easy to provide there a touchpad feature and to provide there user feedback and user guidance via simple and discrete indicator elements, such as LEDs, segment indicators (e.g. seven-segment-indicators), illuminable symbols, etc.

As used herein, a discrete indicator element is neither a pixel-based display nor a single pixel out of a great number of pixels that form such a display. By way of example, a discrete indicator element may be a symbol that is illuminable by a respective light source, as LEDs, for instance.

The sensor layer is arranged as a two-dimensional or even as a three-dimensional (when a two-dimensional sheet is deformed) sensor network, sensor mesh, and/or a sensor grid. By way of example, the sensor network may be formed on a foil which is thus flexible and which may be deformed to match a two-dimensional and/or a three-dimensional target shape. For instance, the conductive grid may be formed by printing or a similar technique.

The rotary knob and the control panel that incorporates the rotary knob may be designed, manufactured, configured and/or operated in accordance with several aspects and embodiments of the present disclosure.

In an exemplary embodiment of the rotary knob, the sensor layer is a flexibly configurable sensor layer having a sensor network that defines an area which is available for operator inputs, wherein the sensor layer is sectionally activatable depending on a desired input mode so as to define at least one field corresponding to a sectionally activatable area to be monitored for operator inputs on the sensor layer depending on the desired input mode, and wherein the at least one defined field is a subset of the available area formed by the sensor network.

Hence, based on a single one or a small number of basic configurations, a huge number of variants may be defined by respectively operating and tailoring the basic configuration. One on the same sensor layer may be used to detect rotary input via the rotatable ring, and touch input via the frontal plate.

In accordance with an exemplary embodiment of the rotary knob, the sensor layer also extends beneath and along the support collar and forms there a rotary input detector field that is responsive to rotary movements of the rotatable ring. In other words, the rotary knob may include a rotary encoder feature.

In an exemplary embodiment of the rotary knob, the rotary input detector field is arranged to detect movements of an operator's fingers as the rotatable ring is rotated. By way of example, the rotary input detector may be arranged as a capacitive sensor, wherein the circuitry is arranged to detect changes in capacitance at the sensor layer which are indicative of movements/positions of the rotatable ring when the user operates the rotary knob.

In a further exemplary embodiment of the rotary knob, the rotary input detector field is arranged to detect movements of the rotatable ring. In a further exemplary embodiment of the rotary knob, the rotatable ring comprises a position indicator element, the position of which is detected by the rotary input detector field.

In a further exemplary embodiment of the rotary knob, the rotary input detector field forms a ribbon sensor that is operable to detect angular movements. In other words, as in some embodiments only a single degree of freedom (rotation) is provided for the rotatable ring, the associated sensor field and/or circuitry may be simplified.

In a further exemplary embodiment of the rotary knob, the rotatable ring is rotatably retained between a peripheral edge of the frontal plate and a cover of the control panel from which the support collar extends. Hence, the frontal plate and support collar form a rotation bearing for the rotatable ring.

In a further exemplary embodiment of the rotary knob, the sensor layer is a capacitive sensor layer having a capacitive sensor network. In this way, touch inputs, touch gestures and similar inputs can be detected. As used herein, the term touch input shall also involve user inputs in the proximity of the sensor layer and the rotary knob, respectively. Hence, the term touch input shall not be interpreted in a limiting sense.

In a further exemplary embodiment of the rotary knob, the sensor layer has a three-dimensional shape manufactured through one of thermoforming and high pressure forming, based on a planar shape, wherein the sensor layer is bonded with a support body through in-mold labeling.

In certain embodiments, the support body is a frontal component, for instance at least one of the cover of the control panel and the frontal plate of the rotary knob. In certain embodiments, the support body is a rear component, for instance a light guide that is associated with the rotary knob.

Thermoforming is an established technique to deform originally flat/planar foils/films. High pressure forming (HPF) is a relatively novel technique, wherein the originally flat foil/film is fixed inside a forming tool and brought into the desired shape by a sudden application of heated compressed air at a pressure of 50 to 300 bars, wherein the temperature is in the range of the softening temperature of the foil material. In certain embodiments, also the desired labeling is applied (e.g. printed) prior to the deformation, and prepared and maintained in such a way that even in the three-dimensionally deformed state, the labeling is accurately shaped and positioned. This applies in particular to high pressure forming. The labeling may be on a separate foil/film, of may be printed onto a carrier substrate. Further, in certain embodiments, the labeling may be provided also on the film that forms the sensor layer.

In-mold labeling (IML) may be used to integrate also a decorating layer (labeling) to form symbols, labels, etc. at the rotary knob and, more generally, at the control panel.

In a further exemplary embodiment of the rotary knob, the sensor layer is a basically planar sensor foil, wherein the sensor layer is bonded with a support body through laminating. Also in this way, a multi-functional composite part may be formed, involving the sensor layer, and, at least in some cases, also a labeling. Laminating may be used to bond two, three or even more layers.

In certain embodiments, the support body is a frontal component, for instance at least one of the cover of the control panel and the frontal plate of the rotary knob. In certain embodiments, the support body is a rear component, for instance a light guide that is associated with the rotary knob. In a further exemplary embodiment, the rotary knob further comprises an indexing mechanism for the rotatable ring. Hence, user feedback (e.g. a clicking noise) may be provided also in this way. In accordance with an exemplary embodiment, at least one indexing tooth is formed at the rotary knob, for instance at the rotatable ring and/or at a neighboring component. The at least one indexing tooth may cooperate with respective counterparts, for instance with counterpart indexing teeth and/or an indexing spring, such as a leaf spring. Overall, the indexing mechanism may resemble a rattling and/or ratchet mechanism. The indexing mechanism may on the one hand provide haptic user feedback. On the other hand, the indexing mechanism may provide defined angular offsets and/or angular positions of the rotatable ring with respect to the support collar and/or the frontal plate.

In a further exemplary embodiment of the rotary knob, at least one of the discrete indicator elements is arranged to illuminate a selectively activatable symbol or a discrete selectively activatable segment indicator. Hence, at the frontal plate, visual user feedback may be provided. Preferably, the user feedback/user guidance is provided in reaction to and/or in preparation of user inputs at the frontal plate (touch input) and/or at the rotatable ring (rotary input).

In a further exemplary embodiment of the rotary knob, a seven-segment indicator is formed at the frontal plate that is operable by selectively activating the discrete indicator elements. Consequently, it is possible to provide numerical data and/or alphanumerical information, despite of the absence of a pixel-based display.

By way of example, in a value/range selection mode, the user may select a desired value or range by rotating the rotatable ring, which is promptly indicated by the discrete indicator elements that form the seven-segment indicator and/or a similar indicator.

In a further exemplary embodiment of the rotary knob, the cover cap (frontal plate) and the sensor layer are at least sectionally transparent or translucent. Hence, defined portions of the cover cap may be illuminated.

In a further exemplary embodiment of the rotary knob, the sensor layer overlaps at least some indicator elements of the discrete indicator elements, wherein the circuitry is arranged to detect touch inputs in the vicinity of said indicator elements. Hence, one and the same (frontal) region of the rotary knob may be used both for detecting user inputs and for providing feedback. By way of example, the user may activate certain functions by simply tapping respective fields at the frontal plate, which is instantly confirmed by activating a respective indicator element at or in the vicinity of the field where the input has been detected.

In a further exemplary embodiment of the rotary knob, the sensor layer is arranged between the cover cap and the indicator layer. Hence, the cover protects the relatively fragile sensor layer. The indicator layer forms a rear end of the arrangement. Hence, it is easy to arrange the indicator elements at a carrier substrate, for instance at a foil carrier or a printed circuit board.

In a further exemplary embodiment of the rotary knob, the indicator elements are arranged at a support substrate, wherein a light guide is arranged between the support substrate and the sensor layer. The light guide may form a bridge between the support substrate in the rear and the sensor layer/cover cap at the front. Hence, the freedom of design is increased. The support substrate for the indicator elements may be basically planar and/or otherwise have a relatively simple form. The support substrate may also form a support for the operating circuitry of the rotary knob.

In a further exemplary embodiment of the rotary knob, the support substrate is arranged at a rear side of a cover of the control panel, and wherein the light guide extends from the support substrate into the support collar to the frontal plate. Hence, as the rotary knob is protruding from the cover of the control panel, there is a certain offset between the support substrate and the frontal plate of the rotary knob. It is thus possible to provide a light guide therebetween.

In accordance with a further aspect of the present disclosure, there is presented a control panel for a home appliance, the control panel comprising a rotary knob in accordance with at least one embodiment as described herein. Hence, the rotary knob may be used as the main/primary control element of the home appliance.

In an exemplary embodiment of the control panel, the rotary knob is formed at a frontal cover of the control panel, wherein further discrete indicator elements are arranged at the frontal cover in the vicinity of the rotary knob, wherein the circuitry is arranged to operate indicator elements at the control panel in response to user inputs detected at the rotary knob. Hence, the rotary knob may be used to provide control commands that are confirmed by activating/deactivating indicator elements on the level of the frontal cover of the control panel, and not necessarily on the level of the frontal plate of the rotary knob itself. It is to be noted that of course user inputs may be detected also on the level of the frontal cover of the control panel which involves that also there a sensor layer for detecting touch inputs and gestures may be provided.

Generally, the control panel may be arranged in accordance with at least one embodiment as described herein. The rotary knob may be used to augment the control panel's function.

In accordance with a further aspect of the present disclosure, there is presented a home appliance comprising a control panel having a rotary knob in accordance with at least one embodiment as described herein.

It is to be understood that the previously mentioned features and the features mentioned in the following may not only be used in a certain combination, but also in other combinations or as isolated features without leaving the spirit and scope of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

Further features and exemplary embodiments are disclosed in the description below with reference to the drawings, in which:

FIG. 1 shows a perspective view of a home appliance comprising an operating front plate;

FIG. 2 shows a simplified, perspective exploded illustration of a front plate component for an operating front plate of a home appliance;

FIG. 3 shows a very simplified schematic illustration of a lateral section through a configuration of a front plate component;

FIG. 4 shows a very simplified schematic lateral section through a further configuration of a front plate component;

FIG. 5 shows a schematically very simplified plan view of a sensor layer for visualizing possible user inputs or user gestures;

FIG. 6 shows a further schematically very simplified plan view of a sensor layer with allocated fields in which user inputs are to be detected;

FIG. 7 shows a schematically very simplified front view of a configuration of a front plate component with visual elements for operator guidance;

FIG. 8 shows a further simplified front view of an alternative configuration of a front plate component with visual elements for operator guidance;

FIG. 9 shows yet a further simplified front view of a further alternative configuration of a front plate component with visual elements for operator guidance;

FIG. 10 shows a further simplified front view of yet another configuration of a front plate component with visual elements for operator guidance;

FIG. 11 shows a schematic block diagram of an exemplary embodiment of a method for operator guidance for operator inputs, in particular in a home appliance;

FIG. 12 shows a schematic block diagram of an exemplary embodiment of a method for producing a front plate component, in particular for an operating front plate of a home appliance;

FIG. 13 shows a perspective view of an exemplary embodiment of a control panel for a home appliance, which is equipped with a rotary knob;

FIG. 14 shows a detail view of the arrangement of FIG. 13;

FIG. 15 shows an exploded view of the arrangement of FIG. 13;

FIG. 16 shows a frontal view of the arrangement of FIG. 13;

FIG. 17 shows a cross-sectional view of the arrangement of FIG. 16 along the line XVII-XVII in FIG. 16; and

FIG. 18 shows an exploded view of the arrangement of FIG. 17.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

FIG. 1 shows a perspective view of a home appliance 10, which comprises a front plate arrangement or operating control panel 12. The home appliance 10 may be, for example, a dishwasher or the like. Home appliances 10 may be configured, by way of example, as washing machines, refrigerators, freezers, ovens, hobs, microwaves, tumble dryers or the like. Home appliances which combine various functions, such as refrigerator/freezer combinations, for example, are also conceivable.

By way of example, the operating front plate 12 comprises at least one control panel component 14. The at least one control panel component 14 may comprise regions in which elements for operation or for user interaction are arranged. It goes without saying that the operating front plate 12 may in particular be substantially integral. The control panel component(s) 14 may be integral parts of the operating front plate 12. However, it is also conceivable for a plurality of control panel components 14 to be embodied as individual parts and to be joined to form the operating front plate 12.

FIG. 2 shows a very simplified schematic perspective exploded illustration of an exemplary configuration of a control panel component 14. An arrow denoted by 16 in this case identifies a typical viewing direction of an operator who may perform operating inputs at the control panel component 14. On its side facing the operator, the control panel component 14 comprises a cover layer 20, which may in particular be configured as a plastic component. A sensor layer 22 is arranged “behind” or “underneath” the cover layer 20, from the point of view of the operator. The sensor layer 22 may be in the form of, for example, a sensor layer 22 for detecting touches or increasing proximity. It goes without saying that the sensor layer 22 in the exemplary embodiment illustrated using FIG. 2 may be designed to detect touches or increasing proximity on the plane of the cover layer 20, which may cover, in particular completely cover, the sensor layer 22. The sensor layer 22 may in particular be configured as an at least sectionally touch-sensitive conductive film.

A so-called indicator layer 24 may adjoin the sensor layer 22 at the rear, i.e. on that side of the control panel component 14 which is remote from the operator during normal operation. This indicator layer may be configured, for example, to visually highlight specific regions of the sensor layer 22 for the operator for the purposes of operator guidance and interaction. In accordance with various exemplary configurations, the cover layer 20 may be provided at least partially with transparent or translucent regions 26. Similarly to this, the sensor layer 22 may also be configured so as to be translucent or transparent, at least sectionally.

This sensor layer 22 may comprise a sensor network 28 and be configured as a film component, for example, which comprises various conductive regions. The sensor layer 22 may be configured as a transparent film, but alternatively also as a substantially opaque film. It goes without saying that the sensor layer 22 may comprise a layer structure, for example various conductive layers which are insulated from one another. The sensor layer 22 may generally define a region in which operator inputs (touches or increasing proximity) in the region of the cover layer 20 may be detected and evaluated.

The indicator layer (also: indicator plane) 24 may comprise at least one discrete indicator element 30. By way of example, the indicator layer 24 illustrated using FIG. 2 comprises a first discrete indicator element 30 a and a second discrete indicator element 30 b. The indicator layer 24 does not need to be provided as a physical part. Instead, the indicator layer 24 may be interpreted, at least in some configurations, as a (logical) combination of various discrete indicator elements 30. It goes without saying, however, that, in alternative configurations, the indicator layer 24 may act as a carrier structure for the at least one discrete indicator element 30, by way of example.

The at least one discrete indicator element 30 may be configured, by way of example, as a pictogram, a symbol, (predefined) alphanumeric indicator, a segment indicator, a segmented bar indicator or the like. The at least one discrete indicator element 30 should in particular not be understood as being limited to a pixel-based graphical indicator element. Instead, in some exemplary embodiments the at least one discrete indicator element is predefined and designed in such a way that precisely one item of graphical information or a specific number of different items of graphical information are represented. The at least one discrete indicator element may be illuminated in particular in order to ensure sufficient visual highlighting for the operator. Light-emitting diodes, (discrete) LCD elements or the like are suitable for this, for example. A limited variation of the information which may be represented by the at least one discrete indicator element 30 may be performed, for example, by color highlighting. In addition, in particular in the case of segment-like discrete indicator elements 30, a variation of the information which may be represented may be performed by actuation of various segments/sub-elements. Accordingly, alphanumeric information items, in any case to a limited extent, may also be represented by means of segment indicators, wherein the number of digits or letters which may be indicated is predefined and limited.

Control panel components 14 in accordance with various configurations of the present disclosure make use of the fact that the sensor layer 22 may be applied to the cover layer 20 over a large area at reasonable cost. Joining the cover layer 20 to the sensor layer 22 may comprise, for example, adhesive bonding, encapsulation by injection molding, in-mold molding, embedding, force-fitting and/or form-fitting mounting and further conventional joining methods. In this way, the control panel component 14 may be manufactured with a basic configuration, for example comprising the cover layer 20 and the sensor layer 22, with a reasonable level of complexity with mass production. The control panel component 14 is particularly suited for selective prefabrication. For example, this may include the allocation of sections of fields of the sensor layer 22 for detection of specific operator inputs. In other words, a predefined basic configuration by means of targeted actuation of the sensor layer may be used with little complexity for a large number of variations in respect of the ranges of operations allowed and offered.

Exemplary configurations in respect of the layer structure of the control panel components 14 are illustrated in FIGS. 3 and 4, which each show very simplified schematic sections through control panel components 14. FIG. 3 shows a control panel component 14, which may substantially correspond to the control panel component 14 illustrated in FIG. 2, for example. The control panel component 14 shown in FIG. 3 comprises a cover layer 20, a sensor layer 22 and an indicator layer 24. The indicator layer 24 is provided with various discrete indicator elements 30 a, 30 b, 30 c. The control panel component 14 may be coupled to a control device 42, which may communicate with the sensor layer 22 and the indicator layer 24 via an interface 36 and corresponding connecting lines 38, 40. The control device 42 is connected to the sensor layer 22 via the connecting line 38. The control device 42 may detect information items which describe, for example, touches or increasing proximity to an outer face 34 of the cover layer 20 via the connecting line 38. Operator inputs may be performed by means of an actuator 32, 32 a. The actuator 32, 23 a may be, in particular, a body part of the operator, for example a finger. However, it is also conceivable for a stylus or the like to be used. The sensor layer 22 and the control device 42 may be configured to detect touches of the cover layer 20, cf. the finger 32. Alternatively or in addition, the sensor layer 22 and the control device 42 may also be configured to detect increasing proximity, i.e. no direct touching contact, to the cover layer 20, cf. the finger 32 a.

In addition, the control device 42 may be coupled to the discrete indicator elements 30 a, 30 b, 30 c via the connecting line 40. The discrete indicator elements 30 a, 30 b, 30 c may be actuated or activated selectively in order to instruct the operator or guide the operator during a desired operator input. In particular, the discrete indicator elements 30 a, 30 b, 30 c may be used for visually highlighting a presently allocated and provided subsection or field of the sensor layer 22. In this way, the sensor layer 22 may be used for a large number of different inputs and is configurable flexibly in this regard.

It goes without saying that the discrete indicator elements 30 a, 30 b, 30 c in various alternative configurations may also at least partially overlap one another. In this way, one and the same region of the cover layer 20 may be used for different inputs, depending on the configuration of the sensor layer 22. By way of example, one and the same region may, in the case of a washing machine, be used for selecting a program mode, for preselecting temperature and for time control and for the required user inputs or operator inputs associated therewith. It goes without saying that the section actually used in each case or the respectively selected field of the sensor layer 22 does not need to be identical or congruent. Instead, by means of logic actuation of the sensor layer 22, a large number of sections or fields may be defined and may be used for detecting and evaluating operator inputs. The definition and allocation of the fields may take place, for example, on a software basis and/or using circuitry.

FIG. 4 shows an alternative configuration of a control panel component 14 a. The control panel component 14 a comprises a cover layer 20 and a sensor layer 22, which is arranged or applied on that side of the cover layer 20 which is remote from the operator. The sensor layer 22 is configured for detecting touches or increasing proximity. For actuation or evaluation of inputs detected at the sensor layer 22, the control panel component 14 a may be coupled to a control device 42, which may be connected to the sensor layer 22 via an interface 36 by means of a connecting line 38. The cover layer 20 may furthermore be provided with at least one operating symbol 46. By way of example, the control panel component 14 illustrated using FIG. 4 comprises a raised operating symbol 46 a and a depressed operating symbol 46 b on its cover layer 20. In general, the operating symbols 46 may be provided so as to be optically and/or haptically perceivable in the cover layer 20.

Printing methods, surface treatment and/or surface coating methods, material removal methods or the like are suitable, for example, for producing the operating symbols 46. The operating symbols 46 may be introduced into the cover layer 20 during shaping thereof, for example during injection molding. The operating symbols 46 may in principle comprise color highlighting. As has previously been illustrated, the sensor layer 22 may define a potentially possible region in which user inputs may be detected. The sensor layer 22 may now be actuated in such a way that certain sections or fields, i.e. subsets of the sensor layer 22, may be used and evaluated in a targeted manner for specific user inputs. The respectively defined fields may be in particular adjacent or assigned to the respective operating symbol 46 a, 46 b.

In accordance with a further exemplary embodiment, for example, a “semi-finished product” of the control panel component 14 a may be manufactured which comprises a basic configuration. Such a “semi-finished product” may then be used for forming variants by virtue of various operating symbols 46 being highlighted in a targeted manner thereon. This may be performed, for example, by means of printing. A presently selected configuration of the operating symbols 46 a, 46 b may be linked with an associated logic actuation of the sensor layer 22. On the basis of only a basic configuration, a large number of variants may be realized; this may be performed without any substantial additional complexity in terms of the hardware for the detection and evaluation of the operator inputs.

FIG. 5 illustrates a schematic plan view of an exemplary sensor layer 22. The sensor layer 22 comprises a sensor network 28, which may have, for example, a structure comprising columns and rows. In this case, for example, an arrow denoted by 48 may illustrate a first direction and an arrow denoted by 50 may illustrate a second direction. The arrows 48, 50 may represent, by way of example, an X direction and a Y direction. The sensor layer 22 is designed to detect operator inputs in terms of location (i.e. in relation to the first direction 48 and the second direction 50). This may take place, for example, in the case of a capacitive sensor layer 22, by influencing of a capacitance on the basis of a touching contact or an increasing proximity which is detected and evaluated.

By way of example, FIG. 5 also illustrates various conceivable operator inputs or operator gestures which may be detected and evaluated. 52 a illustrates a single touch (tap or click). 52 b illustrates a double touch in temporal succession (a so-called double click). 52 c illustrates a gesture in the form of a sliding movement (so-called swiping), cf. also the associated movement direction which is illustrated by an arrow denoted by 54. In addition, 52 d illustrates a complex gesture which may be performed, for example, using two fingers (or finger and thumb). This may include, for example, a substantially simultaneous touch with two fingers and, after this, a movement of the fingers away from one another, cf. the associated directional indications which are illustrated by the arrows denoted by 56 a, 56 b. Such a gesture may be used, for example, for scaling or “zooming”. In an exemplary embodiment the sensor layer 22 is designed for simultaneous detection of a plurality of touches or increasing proximity. Such a function may be referred to as multi-touch functionality.

FIG. 6 illustrates a logical subdivision of a sensor layer 22. As already illustrated above, the sensor layer 22 may define a region which may potentially be used for detecting user inputs. Within this potentially possible region, for example, fields 60 a, 60 b may now be defined which may represent the subsets of the sensor layer 22. The allocation and definition of the fields 60 a, 60 b may take place flexibly and may be associated with little complexity (in terms of software or circuitry). One and the same region of the sensor layer 22 may be used (temporally spaced apart) for different fields 60, which may at least partially overlap one another. For detection in terms of position of operator inputs which are performed in field 60 a, in particular regions denoted by 62 a, 64 a of the sensor layer 22 need to be evaluated. In order to detect operator inputs which are performed in the field 60 b, in particular monitoring of a region of the sensor layer 22 which is denoted by 62 b, 64 b is of interest. The regions 60 a, 60 b are flexibly selectable and may be stored in the control device 42 (cf. FIG. 3 and FIG. 4), for example, using software or circuitry during manufacture.

Various further exemplary configurations of control panel components which comprise various discrete indicator elements and/or operating symbols for operator guidance are illustrated using FIGS. 7, 8, 9 and 10.

The control panel component 14 b shown in FIG. 7 comprises information objects 68 a, 68 b which, in principle, may be formed by one of the indicator elements 30 of the indicator layer 24 or by one of the operating symbols 46 of the cover layer 20. In addition, the control panel component 14 b comprises discrete indicator elements in the form of pictograms 70 a, 70 b. The pictograms 70 a, 70 b may be, by way of example, light indicators or illuminated symbols. In the present configuration, fields 60 a, 60 b of the sensor layer 22 (cf. FIG. 6) may be defined or selected in such a way that a first field 60 a extends in a region in which the pictogram 70 a is arranged. In addition, a field 60 b may extend in a region in which the pictogram 70 b is arranged. The operator may now perform his inputs directly via the pictograms 70 a, 70 b, which may furthermore indicate to him also the desired nature of the input.

By way of example, the operator may perform a swiping movement or sliding movement in the field 60 a, which swiping movement or sliding movement is oriented on the pictogram 70 a which represents a double arrow. In this way, the operator may select a temperature, for example. The pictogram 70 b illustrates a circular arrow. In this way, it is possible to indicate to the operator that he may select a program, for example, by means of a swiping movement along a circular path. The exemplary embodiment illustrated using FIG. 7 may be coupled to a further indicator (not illustrated) in order to provide feedback to the operator in respect of his input.

FIG. 8 illustrates a further exemplary configuration of a control panel component 14 c. The control panel component 14 c is provided, by way of example, with information objects 68 a, 68 b, which may be configured, for example, as printed or similarly configured operating symbols. In addition, the control panel component 14 c comprises indicator elements in the form of segment indicators 72 a, 72 b, which are (logically) linked to defined fields 60 a, 60 b of the sensor layer 22 (cf. FIG. 6). Each of the segment indicators 72 a, 72 b may be formed from a plurality of selectively activatable segments 74 a, 74 b. The segment indicators 72 a, 72 b and the fields 60 a, 60 b associated therewith may be linked to one another in such a way that a user may perform an input directly on the respective indicator. In other words, the operator may activate, for example, one of the segments 74 a, 74 b by means of a corresponding touch or similar gesture. Feedback to the operator may be performed without any significant time delay by activation or deactivation of the corresponding segment 74 a, 74 b.

The segment indicator 72 a may act as bar indicator, for example. The bar indicator may illustrate a temperature level, for example. The operator may select a desired temperature level by touching or “swiping”, and this temperature level is fed back to said operator directly by corresponding activation of the segment 74 a of the segment indicator 72 a. Similarly, the operator may select a desired program, for example, in the case of the segment indicator 72 b by selecting one of the segments 74 b. This may be illustrated to him directly after his selection by visual highlighting of the selected or deselected segment 74 b.

FIG. 9 shows a further alternative configuration of a control panel component 14 d. The control panel component 14 d may also comprise operating symbols which are visually and/or haptically perceivable on the associated cover layer (cf. FIG. 4). These may be printed text 68, for example. The printed text 68 may indicate, by way of example, a linked field 60 b which is located in the region of a pictogram which is configured as an illuminated symbol 72, by way of example. The printed text 68 and the illuminated symbol 70 may jointly instruct the user during his input. It goes without saying that a selected (operating) field 60 may in principle also be linked to a passive operating symbol, for example passive printed text or the like, without an (active) indicator element being assigned to the (operating) field 60. Corresponding printed text may include, for example, a symbol and an identification of the region in which the user may make his inputs or may perform his selection.

In addition, the control panel component 14 d comprises a segment indicator 76, which is configured in particular as a seven-segment indicator. The segment indicator 76 comprises a plurality of segments 78. A corresponding field 60 a for operator inputs is associated with the seven-segment indicator 76. It is conceivable for the operator to be able to perform inputs directly at the indicator 76 in the field 60 a, for example by selectively activating or deactivating one of the segments 78. In addition, it is conceivable for the segment indicator 76 to be used for feedback to the operator when said operator is performing inputs over the pictogram 70 in the field 60 b, for example.

FIG. 10 illustrates a further configuration of a control panel component 14 e, which may comprise various indicator elements and operating symbols for operator guidance. For example, an operating symbol in the form of printed text 68, representing a clock, is provided. In this way, it is communicated to the operator that a time period or clock time may be set at the control panel component 14 e. This may take place, for example, in a field 60 b which is defined in the sensor layer 22. The field 60 b may be assigned to a seven-segment indicator 76, by way of example. In addition, the field 60 b may cover a pictogram or an illuminated symbol 70 b, at which the operator may perform his inputs. Feedback may be performed directly via the seven-segment indicator 76.

The control panel component 14 e also comprises a field 60 a, which is arranged above a pictogram 70 a. The pictogram 70 a may indicate to the operator, for example, that he may perform inputs in the field 60 a in order to perform scaling or matching of the input sensitivity in the field 60 b. In other words, the operator may reduce or increase the sensitivity to time inputs in the field 60 a by means of a “zoom gesture”, for example. In this way, firstly it is possible to run through the potential value range quickly. Secondly, it is possible to perform a high-accuracy input where it is desired. It would in principle also be conceivable to arrange an input field 60 c directly above the symbol which is illustrated by the printed text and/or surface processing 68. In this way, a user may effect a corresponding input, for example by gestures which he performs directly on the symbol (in this case on the representation of a clock, for example).

It goes without saying that the active objects 70, 72 and 76 which are illustrated using FIGS. 7 to 10 may be arranged as indicator elements in the indicator layer 24. These elements may be activated selectively and in this way perceived visually by the operator through the sensor layer 22 and the cover layer 20.

Furthermore, it goes without saying that the aspects and configurations illustrated using the exemplary configurations shown in FIGS. 7 to 10 may be combined with one another as desired in order to be able to provide a large number of different input possibilities to the operator in a simple manner with little production complexity. This takes place in principle with a high degree of versatility in terms of variants. A significant advantage consists in the free scalability and assignability of the selected (operating) fields 60 in the region which is made available by the sensor layer 22, in principle.

FIG. 11 illustrates, in simplified form, an exemplary embodiment of a method for operator guidance, for example for operator inputs in the case of a home appliance. This may take place advantageously using a control panel component 14 and an operating front plate 12 provided therewith, which are configured in accordance with various aspects of the aspects mentioned and described above. In a step S10, a control panel component is provided which comprises a sensor layer hidden by a cover layer, which sensor layer is designed to detect operator inputs and in particular operator gestures.

In a further subsequent step, a present input mode is defined. The step S12 may in particular include a (sub)step S14, in which a field which comprises a section or a subset of the sensor layer, for example, is defined and allocated for evaluation. In addition, this may be linked with a (sub)step S16, which comprises the activation of at least one discrete indicator element in order to visually illustrate the presently activated field to the user for his inputs. Alternatively or in addition, in step S12, a (sub)step S18 may be provided which comprises the assignment of a selected (operating) field to an operating symbol, which is provided on the cover layer of the control panel component. The operating symbol may be, for example, a printed operating symbol or the like. A field which is in principle freely selectable in the region of the sensor layer may be assigned to the operating symbol (on a software or circuitry basis).

In addition, the step S12 may comprise an optional (sub)step S20, which comprises outputting feedback to the operator. For this purpose, at least one discrete indicator element may be actuated or activated. In this way, an input made by the operator may be made directly visually identifiable to the operator. In an exemplary embodiment the at least one indicator element is arranged in the region of the presently allocated field for operator inputs. Thus, the operator is given the impression of performing his inputs “directly” at the indicator element. Step S12 may be followed by a step S22, which comprises the detection and evaluation of the operator inputs in the presently defined field to be evaluated.

FIG. 12 illustrates, in simplified form, an exemplary embodiment of a method for producing or manufacturing a control panel component, in particular for an operating front plate of a home appliance. The method may comprise steps S30, S32 and S34. The step S30 comprises the provision of a cover layer, in particular a cover layer consisting of a plastic material. The step S32 comprises the provision of a sectionally activatable sensor layer, in particular an areally extending sensor layer which is designed to detect operator inputs, in particular operator gestures. The step S34 comprises the provision of an indicator layer, which comprises at least one discrete indicator element, which is selectively activatable.

Steps S30, S32 and S34 may be followed by a step S36, which comprises joining the cover layer, the sensor layer and the indicator layer. In this case, the sensor layer may be arranged on a side of the cover layer which is remote from the operator (during normal operation). The indicator layer with the at least one discrete indicator element may be arranged on that side of the sensor layer which is remote from the operator.

This may be followed by a step S38, which comprises allocation of at least one defined field on the sensor layer depending on a desired input mode. For example, fields on the sensor layer 22 may be selected and defined which are assigned to at least one discrete indicator element. In addition, however, fields which are assigned to operating symbols or similar optically and/or haptically perceivable symbols which are provided in the cover layer may also be selected. The step S38 may be performed particularly flexibly in order to implement a large number of variants on the basis of a given sensor layer.

The step S38 may comprise a step S40, which comprises the provision of an interface for actuation of the sensor layer and, if required, for actuation of the at least one discrete indicator element. In addition, the step S38 may comprise the provision and installation of a control device as is illustrated by a step S42. A control device may be linked, via the interface, to the composite structure comprising the cover layer, the sensor layer and, if provided, the indicator layer. In step S38, access may be made to a database, cf. the reference symbol S44. A plurality of potentially possible configurations including respective input modes may be stored in the database. In step S38, flexible allocation and configuration of a system which comprises the control panel component and the control device linked therewith via the interface or the associated control device may be performed using the database. A configuration of the control device may be performed on a software and/or hardware basis.

Overall, the sensor layer which is provided in a flat manner at the cover layer enables a free and flexible configuration for a large number of different operator inputs. The sensor layer, if provided, may be used for user guidance and for interaction with the user/operator. It is also possible for discrete indicator elements with a comparatively simple configuration or operating symbols provided on the cover layer to provide the operator with the possibility of performing complex operator inputs. This may take place in particular without complex pixel-based indicator elements, with the result that the manufacture may involve a reduced amount of complexity.

With reference to FIGS. 13 to 18, a further exemplary embodiment of a control panel 112 for a home appliance will be elucidated and described.

The control panel 112 comprises a rotary knob 114. In certain embodiments, the rotary knob 114 is the main/major control element for the appliance. As can be seen in FIG. 13 and FIG. 14, the control panel 112 may comprise further user interfaces 116 (input and/out output interfaces) which may generally be referred to as control panel components herein.

The control panel 112 comprises a cover 118 which may be referred to as front cover. In certain embodiments, the cover 118 is arranged as an injection-molded plastic part. In addition to the rotary knob 114, further controls 120 may be provided, for instance an on/off button. As can be best seen in the enlarged view of FIG. 14, there may be symbols 124 (or, more generally, a labeling) and indicators 126 formed in the user interface 116. Generally, the user interface 116 may be arranged in accordance with the control panel components described hereinbefore. The indicators 126 may be illuminated to indicate whether or not a respective option/feature has been selected or not. Further, the indicators 126 may indicate a certain operating state of the appliance. It is to be noted that in certain embodiments, the indicators 126 and the symbols/labeling may be integrally formed (i.e. symbols that can be illuminated or otherwise highlighted).

The rotary knob 114 comprises a rotatable ring 130 and a frontal plate 132. In certain embodiments, the frontal plate 132 is fixed (i.e. non-rotatable). Hence, in accordance with these embodiments, the rotatable ring 130 may be rotated with respect to the frontal plate 132. In FIG. 13, there is indicated a rotation axis 134 for the rotatable ring 130. A curved double-arrow designated by 136 indicates the rotation of the rotatable ring 130 with respect to the frontal plate 132.

Several indicator elements 142, 144, 146 may be provided at the frontal plate 132 of the rotary knob 114. The indicator elements 142, 144, 146 may be combined with symbols, a labeling, etc. In certain embodiments, the rotary knob 114 is arranged for detecting touch inputs at the frontal plate 132. Hence, a certain function, range and/or value associated with the indicator elements 142, 144, 146 may be selected (activated/deactivated/altered) by simply touching or tapping on the respective field at the frontal plate 132. The touch feature of the rotary knob 114 at the frontal plate 132 may be provided in accordance with at least some aspects of the disclosure as discussed hereinbefore.

In the exemplary embodiment illustrated in FIG. 14, the indicator element 142 is associated with a STOP feature. Hence, by touching the respective symbol, the indicator element 142 may be activated/deactivated, and the associated function may be activated. The STOP symbol may be illuminated or de-illuminated in response to a touch event. Further, the indicator element 144 designates symbols which may be as well selected/deselected (and illuminated or de-illuminated, if necessary) by touching the respective portion of the frontal plate 132. In addition, the indicator element 146 is arranged in the exemplary embodiment of FIG. 14 as a seven-segment-indicator. By way of example, the indicator element 146 can be used to display numerical values, ranges, etc. Selecting/altering the values involves a respective rotation of the rotatable ring 130, in certain embodiments. Hence, by rotating the rotatable ring 130, values and ranges, for instance temperature values, durations, starting times, etc. may be easily and accurately defined. A prompt user feedback is provided via the indicator element 146.

Further reference is made to the exploded view of FIG. 15, and to the views of FIGS. 16 to 18. As can be seen in FIG. 15, the rotary knob 114 comprises several components that are attached to or mounted at the cover 118. The frontal plate 132 of the rotary knob 114 forms a cover cap 150. A support collar 152 extends from the cover 118. In the alternative, the support collar 152 may be arranged as a separate part that is bonded or otherwise attached to the cover 118. The support collar 152 in the exemplary embodiment is cylindrical.

Looking features 154, 156 are provided at both the support collar 152 and the frontal plate 132. Hence, the frontal plate 132 may be attached to and locked at the support collar 152. In this way, a rotation bearing for the rotatable ring 130 is formed. The rotatable ring 130 is arranged between a peripheral edge 160 of the frontal plate 132 and the cover 118 of the control panel 112. The rotatable ring 130 is mounted to the support collar 152. In this way, the rotatable ring 130 is rotatable with respect to the cover 118 and with respect to the frontal plate 132.

The rotary knob 114 further comprises a decorating layer 170, which may be also referred to as label. The decorating layer 170 may be formed by printing or coating, for instance. The decorating layer 170 may define the visual appearance of the symbols/labeling at the indicator elements 142, 144, 146 which are highlighted when they are illuminated. Needless to say, in certain embodiments, the decorating layer 170 may be arranged in such a way that indicator elements 142, 144, 146 are always visible at the frontal plate 132 also in a non-illuminated state (e.g. by printing at the front surface of the cover cap 150).

There is further provided a sensor layer 174. In the exemplary embodiment as illustrated in FIG. 15, the sensor layer 174 includes a sensor network 176. By way of example, respective conductive grids may be formed on a foil material (substrate) 178. In certain embodiments, the sensor layer 174 is arranged for capacitance-based touch detection. As indicated further above, in certain embodiments, the sensor layer 174 is obtained through high pressure forming (HPF). Hence, the sensor layer 174 may be brought into a three-dimensional shape.

So as to be operable also in the region of the frontal plate 132 of the rotary knob 114, the sensor layer 174 involves an embossed portion 180. Hence, in certain embodiments, an originally flat (planar) foil may be deformed to match the actual geometry of the control panel 112 and the rotary knob 114.

In the embossed portion 180, detector fields 182, 184 are formed. The detector field 182 is arranged at a frontal end an associated with the frontal plate 132. Hence, touch inputs, touch gestures, etc. at the frontal plate 132 may be detected via the detector field 182 at the embossed portion 180 of the sensor layer 174. At a circumferential portion surrounding the embossed portion 180, the detector field 184 is formed. By way of example, the detector field 184 may have a circular or cylindrical form, or may be at least a section of a circle or cylinder.

Hence, via the detector field 184, the current angular position and/or rotation movement of the rotatable ring 130 may be detected and tracked. In other words, the detector field 184 may also be referred to as rotary input detector field. In certain embodiments, the detector field 184 forms a ribbon sensor that is operable to detect a one-dimensional (rotation) movement/position.

In certain embodiments, the sensor layer 174 is operable to detect via the detector field 184 the angular position/movement of the rotatable ring 130 by detecting the fingers of a user that is rotating the rotatable ring 130 of the rotary knob 114 by means of capacitive sensing. Hence, the position of the rotatable ring 130 can be immediately detected. In alternative embodiments, a distinct position indicator element 186 is provided at the rotatable ring 130. The position of the indicator element 186 can be detected via the detector field 184. Hence, the position of the rotatable ring 130 can be directly detected.

As already discussed hereinbefore, the sensor layer 174 may comprise further detector fields in addition to the detector fields 182, 184, which may be associated, for instance, with a rear side of the cover 118 of the control panel 112 in the region where the user interface 116 (refer also to FIG. 13 and FIG. 14) is formed.

There is further provided a light guide 190 which comprises light channels 192. The light guide 190 guides light for illumination and indicating purposes to the symbols, labels and/or segments that are provided at the frontal plate 132 of the rotary knob 114. In certain embodiments, the light guide 190 also guides light to the user interface 116 at the cover 118. The light guide 190 is arranged between a support substrate 198 and the sensor layer 174.

At the support substrate 198, several components 200, 202 are provided. This may involve illuminating elements, for instance LEDs 200. Further, circuitry 202 and further processing/control elements may be provided. The illuminating elements 200 may be activated/deactivated in response to a user input at the rotary knob 114. Via the light guide 190, light is guided to the frontal plate 132 of the rotary knob 114 and/or the user interface 116 at the cover 118. It is thus possible to provide visual user guidance and/or user feedback.

Further, in certain embodiments, the sensor layer 174 is bonded to a support body through in-mold labeling (IML). This may also include bonding the decorating layer 170. In alternative embodiments, particularly when the sensor layer 174 is basically flat, the sensor layer 174 may be bonded to a support body by laminating, for instance. This may also include bonding the decorating layer 170. In certain embodiments, the light guide 190 forms the support body to which the sensor layer 174 is bonded trough IML. In alternative embodiments, the cover 118 (including the support collar 152) and/or the frontal plate 132 form the support body to which the sensor layer 174 is bonded trough IML.

FIG. 16 is a frontal view of the control panel. Line XVII-XVII in FIG. 16 indicates the position and orientation of a cross-sectional view that is shown in FIG. 17, and in FIG. 18 in an exploded mode. It can be seen in FIG. 17 that the frontal plate 132 is attached to and locked with the support collar 152 via the locking features 154, 156 (e.g. locking hooks and engagement recesses).

The rotatable ring 130 is retained between the peripheral edge 160 and the cover 118 and rotatably mounted on the support collar 152. The support collar 152 extends from the cover 118. The sensor layer 174 with the detector fields 182, 184 is snuggly/closely fitted to the frontal plate 132 and the support collar 152.

The light guide 190 extends between the support substrate 198 and the sensor layer 174 and/or the frontal plate 132. Hence, light emitted by LEDs or similar components 200 at the support substrate 198 is guided to the front of the rotary knob 114.

In FIG. 18 there is indicated by 206 an indexing mechanism for the rotatable ring 130. By way of example, the indexing mechanism 206 includes teeth 208, 210 or similar indexing elements at the rotatable ring 130 and a counterpart. For instance, indexing teeth 208 are formed at an annular face of the rotatable ring 130 or at a circumferential surface thereof. For instance, indexing teeth 210 may be formed at one of the support collar 152 and/or the cover 118. Via the indexing mechanism 206, haptic feedback may be provided when the rotatable ring 118. In certain embodiments, the indexing mechanism 130 includes an indexing spring which cooperates with respective teeth. 

What is claimed is:
 1. A rotary knob for a control panel of a home appliance, comprising: a support collar, a fixed frontal plate forming a cover cap that is arranged at a front end of the support collar, a fixed sensor layer that is operable to detect touch inputs at the frontal plate, the sensor layer being a 3D-shaped sensor foil which has a shape that corresponds to a geometry of the control panel and the rotary knob, discrete indicator elements forming an indicator layer, which include activatable elements, are operable to provide operator guidance, a rotatable ring that is rotatably mounted to the support collar, the rotatable ring being rotatable with respect to the fixed frontal plate, and circuitry arranged to detect rotary inputs via the rotatable ring, and touch inputs via the frontal plate, wherein the sensor layer extends beneath the support collar and forms a rotary input detector field that is responsive to rotary movements of the rotatable ring.
 2. The rotary knob as claimed in claim 1, wherein the sensor layer is a flexibly configurable sensor layer having a sensor network that defines an area which is available for operator inputs, wherein the sensor layer is sectionally activatable depending on a desired input mode so as to define at least one field corresponding to a sectionally activatable area to be monitored for operator inputs on the sensor layer depending on the desired input mode, and wherein the at least one defined field is a subset of the available area formed by the sensor network.
 3. The rotary knob as claimed in claim 1, wherein the rotary input detector field is arranged to detect movements of an operator's fingers as the rotatable ring is rotated.
 4. The rotary knob as claimed in claim 1, wherein the rotary input detector field is arranged to detect movements of the rotatable ring, and wherein the rotatable ring comprises a position indicator element, the position of which is detected by the rotary input detector field.
 5. The rotary knob as claimed in claim 1, wherein the rotary input detector field forms a ribbon sensor that is operable to detect angular movements.
 6. The rotary knob as claimed in claim 1, wherein the rotatable ring is rotatably retained between a peripheral edge of the frontal plate and a cover of the control panel from which the support collar extends.
 7. The rotary knob as claimed in claim 1, wherein the sensor layer is a capacitive sensor layer having a capacitive sensor network.
 8. The rotary knob as claimed in claim 1, wherein the sensor layer has a three-dimensional shape manufactured through one of thermoforming and high pressure forming, based on a planar shape, and wherein the sensor layer is bonded with a support body through in-mold labeling.
 9. The rotary knob as claimed in claim 1, wherein the sensor layer is a basically planar sensor foil, and wherein the sensor layer is bonded with a support body through laminating.
 10. The rotary knob as claimed in claim 1, further comprising an indexing mechanism for the rotatable ring.
 11. The rotary knob as claimed in claim 1, wherein at least one of the discrete indicator elements is arranged to illuminate a selectively activatable symbol or a discrete selectively activatable segment indicator.
 12. The rotary knob as claimed in claim 11, wherein a seven-segment indicator is formed at the frontal plate that is operable by selectively activating the discrete indicator elements.
 13. The rotary knob as claimed in claim 1, wherein the cover cap and the sensor layer are at least sectionally transparent or translucent.
 14. The rotary knob as claimed in claim 1, wherein the sensor layer overlaps at least some indicator elements of the discrete indicator elements, and wherein the circuitry is arranged to detect touch inputs in the vicinity of said indicator elements.
 15. The rotary knob as claimed in claim 1, wherein the sensor layer is arranged between the cover cap and the indicator layer, wherein the indicator elements are arranged at a sup-port substrate, and wherein a light guide is arranged between the support substrate and the sensor layer.
 16. The rotary knob as claimed in claim 15, wherein the support substrate is arranged at a rear side of a cover of the control panel, and wherein the light guide extends from the support substrate into the support collar to the frontal plate.
 17. A control panel for a home appliance comprising a rotary knob as claimed in claim
 1. 18. The control panel as claimed in claim 17, wherein the rotary knob is formed at a frontal cover of the control panel, wherein further discrete indicator elements are arranged at the frontal cover in the vicinity of the rotary knob, and wherein the circuitry is arranged to operate indicator elements at the control panel in response to user inputs detected at the rotary knob.
 19. A home appliance comprising a control panel as claimed in claim
 17. 